[clang] [llvm] [AMDGPU] Add intrinsics and builtins for v_wave_match_b32 (PR #226971)

[Matt Arsenault via llvm-commits]

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@@ -247,6 +247,10 @@ Makes programs 10x faster by doing Special New Thing.
   * `llvm.amdgcn.icmp`
   * `llvm.amdgcn.fcmp`
 
+* Added the `llvm.amdgcn.wave.match.b32` intrinsic (and matching
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arsenm wrote:

This is a weird thing to get its own release note. Isn't this just more gfx13 support?

https://github.com/llvm/llvm-project/pull/226971